Swallowing of a Chicken Bone.

Hello, I know this sounds terrible, but my son got ahold of a small chicken bone, and he choked on it, I tried to get it out, but I only pushed it down. He doesnt seem to be in any pain, and I called my mother in law, she is a medical assistant, and she said it isn't anything to worry about because his body will digest it, and his acids will eat it up, but I can't help but worry. Is there anything that can happen? Should I be concerned or am I overexaggerating ? Please help me. Im just so afraid that the sharpness is going to punch a whole in something.